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Xcom (PTS)	Xcursor	Xenon
Xerox Doodle brush	Xerox EDMICS-MMR	Xerox EDMICS-RLC
XiE	Xiafs	Xiao Steganography
Xiaomi backup folder	Xidie Secure Archives	Xidie Security Suite
Xidie archive	Xim	XnView
XnView Frame	Xnconvert	Xpa32
XtreemFS	Xtremeworlds PWX	Xtremeworlds map
XviD	Xvimage	Xwindows
Xxencoding	YAC	YAFA
YAFFS	YAML	YAML Ain’t Markup Language
YBM	YEnc	YM
YMODEM	YUSCII	YUV
Yahoo Groups	Yamazaki zipper archive	Yass-js
Yaz0	Yaz0 (Nintendo)	Yeo
Yobj	YouTube	Young Picasso
Z	Z-File Camouflage/Encryption System	Z-code
Z-machine XZIP Picture Library	Z/Install	Z/Install Lite
Z3D	Z85	ZAP
ZAR (Zip-Archiv)	ZBR (Zoner Zebra)	ZCI
ZED	ZEDCOM	ZFS
ZFS (IBM)	ZIL	ZIM
ZIP	ZIPD	ZIPI
ZMF (Zoner)	ZMODEM	ZOO
ZPAQ	ZPAQL	ZPack (LeadRDRK)
ZPack Lite	ZSCII	ZSQ
ZSQ (LZW compression)	ZSoft ZPK2	ZXT/ZAX
ZX Microdrive	ZX Spectrum Beta Disc 3.5" floppy	ZX Spectrum Beta Disc 5.25" floppy
ZZT	ZZ ROUGH	Zbrush MatCap
Zcash	Zchunk	Zeiss BIVAS
Zelda Solarus DX saved game	Zeno	Zet
Zig Zag Ancient Greeks	Zilite	Zip/rar.mp3
Zip disk	Zipped Steganography	Zipx
Zisofs	Zj-Stream	Zlib
Zone file	Zoo	Zoo Z format
Zoo filter format	ZoomBrowser Ex thumbnail cache	Zoom Project Settings
Zoomify PFF	Zoomify ZIF	Zotero
Zpack	Zpng	Zsound Music
Zstandard	Zstandard dictionary	Zstd
Zzip	Ć	Μ-law
Π	Πfs	文言